Emilia Fox Nikki Alexander Actor David Caves Jack Hodgson Actor Liz Carr Clarissa Mullery Actor Richard Lintern Dr Thomas Chamberlain Actor Robert McCafferty Peter Wallace Actor Caroline Paterson Bridget Wallace Actor Christopher Hatherall Niall Wallace Guest Star Tom Davey City Boy Guest Star Sharon Bloom Producer Phillippa Giles Executive Producer Timothy Prager Writer Ed Whitmore Writer Craig Viveiros Director Tracey Malone Writer